Remove sphinx examples emphasize-lines
Remove sphinx examples emphasize-lines

The emphasize-lines was becoming inconsistent and
is hard to keep up to date in the correct manner so
removing it since we already provide introduction
comments in the examples and emphasizing/highlighting
them does not add much meaningful benefit.

Change-Id: I406dd606df75e7523703812803255418ec2f47d8

junneyang/taskflow,openstack/taskflow,pombredanne/taskflow-1,jimbobhickville/taskflow,pombredanne/taskflow-1,openstack/taskflow,jimbobhickville/taskflow,junneyang/taskflow